Data Sheet

HBT Series – Half-Brick DC/DC Converter

48V Input

60 Watt Triple Output

REV. 10/01

Page 2 of 12

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Table 1. Absolute Maximum Ratings

Parameter

Symbol

Min

Max

Units

Input Voltage

Continuous

Transient

Vi

Vi

-

-

80

100

Vdc

Vdc

Operating Baseplate Temperature

Note 1

Tb

-40

+100

Storage Temperature

Tstg

-55

+125

Input to Output Isolation

-

-

1500

Vdc

Output Short Circuit Duration

-

-

Continuous

-

Total Output Power

Pomax

-

60

W

No Load Power Dissipation

-

6

W

Electrical Specifications

Unless otherwise indicated, specifications apply over all input voltages, resistive load, and Tbp=+40

Table 2. Input Specifications

Parameter

Symbol

Min

Typ

Max

Units

Voltage Range

Vi

33

48

75

Vdc

Maximum Input Current

Ii

-

-

3

A

Input Ripple Rejection (120Hz)

-

60

-

dB

Inrush Transient

-

-

1

A

Input Reflected Ripple (See Fig.1)

100

Fusing considerations

Caution: This DC-DC converter is not internally fused. An external input fuse must always be used.

Table 3. Output Specifications

Parameter

Symbol

Min

Typ

Max

Units

Output Power

Po1

Po2

Po3

-

-

-

-

-

-

60

30

30

W

W

W

Output Voltage Set Point

(Vi=48Vdc, Io1=6A,

Io2=Io3=1.25A)

Vo1

Vo2, Vo3

4.9

11.834

5.0

12.2

5.1

12.566

Vdc

Vdc

Output Line Regulation:

(Vi=Vi,min to Vi,max)

(Io1=6A, Io2=Io3=1.25A)

Vo1

-

0.02

0.1

%

Output Load Regulation:

(0.5A to Iomax)

Vo1

-

0.2

0.4

%

Output Load Regulation:

(Vi = Vi.min to Vi,max)

(All Loading Conditions)

Vo2, Vo3

10.5

-

13.5

Vdc

Output Temperature Regulation:

(Tbase =-40

All Outputs

-

0.02

0.05

%/

Output Current

(Maximum output power limited to

60W)

Io1

Io2

Io3

0.5

0

0

6

1.25

1.25

12

2.5

2.5

A

A

A